Hell on Earth — Jeff DeGordick

In a shocking twist of fate, Ron has revealed that he was working for Glass all along and manipulated Sarah into giving total control of the undead over to him. Even worse, they have her son David captive. Battling severe depression and suicidal thoughts, Sarah resolves to take the fight to Glass one last time. But she and Wayne are painfully outnumbered and outmatched. Glass resides in an impenetrable mansion protected by swarms of soldiers and military tech. And his final army is being constructed: a new and incredibly dangerous breed of zombie that will unleash Hell on Earth. Sarah has nothing left except for the unstoppable will to succeed. And she'll do whatever it takes to rescue her son and end this evil once and for all, even if it kills her...